5 out of 6 owners approve deck, so what to do about the 6th?

Hi there,

I wonder if anyone can help? We would like to build a deck in common airspace, and have approval from five out of six lot owners. The sixth lot owner appears to be ignoring our repeated requests for approval/dispproval. Our body corp. manager says we have to have 100% approval in this instance. Do you know if this is correct? I did read somewhere that we could still possibly go ahead with less than 25% disapproval, but our BC manager thinks not. If the sixth lot owner is ignoring our request, what can we do? Any suggestions would be so appreciated. And may everyone have a happy and satisfying 2012. Cheers, Diana